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Shale gas fracturing effect evaluation method

An evaluation method and shale gas technology, which is applied in the fields of earthwork drilling, instruments, and mining fluids, can solve the problems of high cost, long period, and inability to achieve results

Inactive Publication Date: 2016-12-07
SINOPEC CHONGQING FULING SHALE GAS EXPLORATION & DEV
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Problems solved by technology

[0005] The present invention proposes a shale gas fracturing effect evaluation method, which solves the problem that the existing evaluation method involves a large number of ground constructions, high cost, and long period, and cannot achieve real-time evaluation of the effect of single well fracturing

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  • Shale gas fracturing effect evaluation method

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Embodiment Construction

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0017] A kind of shale gas fracturing effect evaluation method of the present invention comprises:

[0018] Step S1, analyze the normal distribution of engineering parameters according to the physical parameters and engineering parameters of shale gas, the physical parameters include: gas density DEN, organic carbon TOC, compressibility P 1 and gas containing V q , engineering parameters include: liquid volume V w , sand volume V s , segment length N fl and the...

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Abstract

The invention relates to the technical field of shale gas fracturing effect prediction and discloses a shale gas fracturing effect evaluation method. The method comprises steps of S1, analyzing the normal distribution according to physical property parameters of shale gas and engineering parameters, wherein the physical property parameters comprise gas density DEN, organic carbon TOC, compressibility P1 and gas bearing capacity Vq, and the engineering parameters comprise liquid volume Vw, sand volume Vs, segment length Nfl and cluster number Nfc; drawing a prediction graph of the shale gas field single well open flow capacity according to the engineering parameters; S3, performing fitting calculation of the shale gas average open flow capacity Q according to the prediction graph, wherein the calculation formula is as follows: Q=17.078e<0.0084*X>, X=0.56*(P1-30.98 / 43.63)+0.32*(2.8-DEN / 2.46)+0.001*(Vw / Nfl)+0.002*(Vs / Nfc)+0.01*TOC / 3.82+0.01*Vq / 6.04, and X represents an integrated engineering geologic factor; and S4, evaluating the fracturing effect according to a linear relation between the average open flow capacity Q and the fracturing effect. The method achieves real-time evaluation of the single well post-fracturing effect.

Description

technical field [0001] The invention relates to the technical field of shale gas well monitoring, in particular to a shale gas fracturing effect evaluation method. Background technique [0002] After fracturing measures are implemented in shale gas wells, effective methods are needed to determine the effect of fracturing operations, obtain information on the conductivity, geometry, complexity, and orientation of fracturing-induced fractures, and improve the effect of fracturing stimulation operations in shale gas reservoirs. and gas well productivity. [0003] Fracture monitoring is an important means to evaluate fracturing effects. At present, fracture detection methods mainly include microseismic detection method, inclinometer monitoring method, direct near-wellbore fracture monitoring method, distributed acoustic sensing method, and mathematical model method of fracturing pressure, etc. , these methods can meet the requirements of fracture detection to a certain extent, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/02E21B43/26
CPCG06Q10/0639E21B43/26G06Q50/02
Inventor 廖如刚王振兴高东伟张怀力李婷胡恩涛吴魏吴琼
Owner SINOPEC CHONGQING FULING SHALE GAS EXPLORATION & DEV
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